Race-knife.



O. M. SCOTT RACE KNIFE.

APPLICATlON FILED MAY7,19I7.

Patented May 7,1918.

o 6 o O WITNESSES lNVENTOR Q11 QZBEHT M. 560W v nr er OZBERT M. SCOTT,OF SEATTLE, WASHINGTON. I

RACE-KNIFE.

Specification of Letters Patent.

Patented May "7, 1918.

Application filed May 7, 1917. Serial No. 167,125.

To all whom it may concern:

Be it known that I, OZBERT -M. fioor'r, a citizen of the United States,residing at Seattle, in the county of King and State of" Washington,have invented a new and useful Improvement in Race-Knives, of which thefollowing is a specification.

This invention relates to improvements in race knives, and the object ofthis improvement is to provide a race knife having a detachable cuttingor marking blade that may be easily removed from the blade shank afterit has become worn.

A further object is to provide a race knife blade of compact form thatmay be placed in an ordinary multiple blade jack knife and that will lieWithin the knife handle and not be in the way when the knife is closed.

A still further object is to provide strong and simple means ofattaching the marking blade to the blade shank.

The invention consists in the provision of a detachable marking bladefor a race knife and in the provision of novel means for securing suchmarking blade to a blade shank, as will be more clearly hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a view in side elevation of ajack knife embodying this invention; Fig. 2 is a plan view looking downon the top of the device shown in Fig. 1; Fig. 3 is a view in sideelevation of the knife with the race blade closed; Fig. 4: is a detachedview in perspective of the marking or cutting blade; and Fig. 5 is aview in perspective of the end of the blade shank as it appears when themarking blade is removed therefrom.

Referring to the drawings throughout which like reference numeralsindicate like parts, the numeral 6 indicates a knife handle which may bethe handle of an ordinary jack knife, and may embody all of the featuresof any ordinary jack knife, except that one of the usual blades isreplaced by a race knife blade constructed in accordance with thisinvention.

The race knife blade in its preferred form consists of a blade shank 7recessed near its outer end to provide a shoulder 8 and having a curvedtip 9 that coacts with the shoulder 8 to hold the marking blade.

The marking blade consists of a flat portion 10 rounded as at 11 to fitthe shoulder 8 and having a U-shaped cutting or marking element 12 thatprojects outwardly from the fiat portion 10 and is sharpened, asindicated at 13 so that it may be used for cutting or marking wood ormetal.

The marking blade is secured to the blade shank by a single screw 14:disposed near the inner end of the fiat portion 10 in such a positionthat it will coact with the shoulder 8 and curved shank tip 9 andrigidly secure the marking blade to the shank.

When a race knife is used a great deal the continued use and continuedsharpening of the blade rapidly wear it away and the knife soon becomesuseless, but when one of the marking blades in the knife herein shownand described is worn down it may quickly and easily be replaced by anew blade.

Another advantage of this knife resides in the fact that the markingelement 12 may be comparatively short when the knife is new thuspermitting the race blade to close compactly and be out of the way.

When the knife is in use, the strain on the marking blade will actdirectly against the shoulder 8 and curved tip 9 of the blade shank, andthere will be very little strain on the screw 14. For the above reasonthere is practically no danger of the marking blade becoming loose inthe blade shank.

If desired a rivet or other form of pin may be used in place of thescrew 14:, or the blade shank 7 may be made a part of an ordinarystraight knife, instead of being placed in a folding jack knife.

It is obvious that changes in the precise form of construction of thedevices herein disclosed may be resorted to within the scope of theappended claims.

What I claim and desire to protect by Letters Patent is:

1. A race knife comprising a blade shank provided with a curved tip anda blade having a curved marking element and adapted to be removablysecured within said tip.

2. A. race knife comprising a'blade shank that is provided with a curvedtip and is recessed to form a shoulder, a blade having a curved markingelement and adapted to fit the end of said blade shank and means forsecuring said blade to said shank.

3. The combination with a race blade having a blade shank that isprovided with a curved tip and is recessed to form a shoulder, of aseparable marking blade adapted to fit within said curved tip and restagainst said shoulder and a pin to eo-act with said curved tip, and saidshoulder to secure said marking blade to said blade shank.

4. The combination Witlia race knife having a blade shank that isprovidedwith a curved tip and is recessed at its outer end to form ashoulder, of a marking blade having a flattened portion adapted to fitWithin the recess in said blade shank and en;- gage With said shoulder,a marking element 10 on said flattened portion and adapted to fit withinthe curved tip of said blade shank and means coaoting with said shoulderand said curved tip for securing said marking blade to said blade shank.

Signed by me at Seattle, Washington, this 15 25 day of April, 1917.

OZBERT M. SCOTT: Witnesses:

JAMES R. CHAMBERS, FRED C. MATHENY.

Copies of this patent may be obtained; for five cents each, byaddressing the Commissioner of E'atents,

- Washington, D. 0.

